I want Grafana to notify us about any error which was logged. I am struggling with the query, however:
sum(count_over_time({app="my-app"} | json | Level="Error" or Level="Critical" or Level="Fatal"[1m])) > 0
When I try to preview alerts, I get this error:
invalid format of evaluation results for the alert definition Failures: looks like time series data, only reduced data can be alerted on.
What do I need to make data reduced?